Hello,
I am considering buying a few small wall- plug DC transformers to power a few of my DC accessories. I can buy these on Amazon of course, but they all come with a "socket" plug at the end, just like phone chargers. I will have to cut this plug off and separate the two wires in order to wire things up.
But, the DC sensors I use will only work if a plus wire is connected to one place, and a negative wire to another. IF this is done backwards, it will burn the sensor out.
So, is there any way, using my voltmeter, to determine which wire is plus and which is minus, coming out of the plug in transformer?
(These sensors come in a three-pack, but I've already burned one up when trying to hook it up to my regular train transformer, because I didn't know the sensor was plus/minus sensitve. )
Thanks, Mannyrock
